N early half of all Americans and around 40% of Britons now use a smartwatch, smart ring, phone app or another similar device to track their sleep. Are these gadgets accurate—an ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. The Apple Watch has a ...

Allison is experienced editor and writer with over 6 years of expertise in both digital and print media, working with city magazines, health and fitness platforms, blogs, podcasts, and small business ...